Add 21/30 and 6/27
21/30 + 6/27 is 83/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 27 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 30 × 9 = 270,
21/30 = 21 × 9/30 × 9 = 189/270 - Likewise, for the 2nd fraction, since 27 × 10 = 270,
6/27 = 6 × 10/27 × 10 = 60/270 - Add the two like fractions:
189/270 + 60/270 = 189 + 60/270 = 249/270 - 249/270 simplified gives 83/90
- So, 21/30 + 6/27 = 83/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30+6/27 21/30+12/27 21/60+6/27 21/30+6/54 63/30+6/27 21/30+18/27 21/90+6/27 21/30+6/81 21/30+30/27 21/30+42/27